Hi BV
We can't tell you what to do here. It's a personal choice. Some people refuse, and some people say yes. Some people have refused and found that their doctor has still been contacted.
You're worried about a doctor giving out-of-date information. I'm afraid that is a risk that everyone faces, Drs don't tend to understand DWP criteria or language and can on occasions say the wrong thing even when they have the intention to help their patient.
The DWP/Assessors don't often contact GPs or other health professionals unless claimants have not given enough information or there is something they particularly want to check.
If you leave it blank, it won't hold up the process - but if they want to contact someone - they probably will anyway.
BIS
Nothing on this board constitutes legal advice - always consult a professional about specific problems 
